Barrel attachment unit for firearm

ABSTRACT

The invention relates to firearms and is a device for mounting the barrel in the receiver. 
     The firearm comprising a receiver with a barrel attachment unit in the form of a clamp, which has on, or more holes in its upper part, a barrel and a base for sighting devices. 
     The barrel is fixed in the barrel attachment unit, and the base for the sighting devices is mounted directly on to the barrel through the holes of the barrel attachment unit. 
     This solution allows to remove the stress from the receiver, arising during the installation of sighting devices, which makes it possible to make the firearm lighter and reduce the production cost. 
     The invention is aimed at improving the performance of the firearm and reducing the production cost.

TECHNICAL FIELD

The invention related to the field of firearms and may be utilized infirearm with detachable barrel.

BACKGROUND OF THE INVENTION

All known prior art solutions for clamping the barrel in the receiver,such as the U.S. Pat. No. 3,731,418A; 3,834,053A; US 20050229463A1; US20120073179A1, the disadvantage of these designs is that theinstallation of optical sights is possible only on the receiver, whichrequires the manufacturer of a receiver from durable materials.

DISCLOSURE OF INVENTION

The present invention allows to transfer the stress from theinstallation of sights from the receiver to the barrel or its breech,which will reduce the weight of the firearm and the production cost.

The task is achieved by the fact that the firearm comprising thereceiver with the barrel attachment unit in the form of a clamp, thebarrel and the base for the sighting devices, has in the upper partholes through which the base for the sighting devices is mounteddirectly on the barrel, on which, in turn, the sights are mounted.

BRIEF DESCRIPTION OF THE DRAWINGS

The essence of the invention is explained by sketches, where:

On FIG. 1—the appearance of the firearm and exploding view with theproposed barrel attachment unit;

On FIG. 2—the appearance of the firearm with the proposed barrelattachment unit, cross-sections along A-A, G-G, H-H the partial view J;

On FIG. 3—the appearance of the barrel and the partial view A;

On FIG. 4—the appearance of the receiver, cross-sections along A-A, B-B,C-C;

On FIG. 5—the appearance of the sight base, cross-section along A-A;

On FIG. 6—the appearance of the firearm and exploding view with theproposed barrel attachment unit, in variant when barrel attachment unithas more than one hole it upper part;

On FIG. 7—the appearance of the firearm with the proposed barrelattachment unit, in variant when barrel attachment unit has more thanone hole it upper part and cross-sections along B-B, C-C, D-D thepartial view E;

On FIG. 8—the appearance of the receiver with the proposed barrelattachment unit, in variant when barrel attachment unit has more thanone hole it upper part and cross-sections along A-A, B-B, C-C;

On FIG. 9—the appearance of the sight base for proposed barrelattachment unit, in variant when one of the supporting lugs of scopebase has a groove;

On FIG. 10—the appearance of the firearm with the proposed barrelattachment unit, in variant when one of the supporting lugs of sightbase has a groove, cross-section along A-A, the partial view B;

On FIG. 11—the appearance of the sight base in variant, when one of thesupporting lugs of scope base has a protrusion;

On FIG. 12—the appearance of the firearm with the proposed barrelattachment unit, in variant when one of the supporting lugs of sightbase has a protrusion, cross-section along A-A, the partial view B;

On FIG. 13—the appearance of the receiver in variant, when the proposedbarrel attachment unit comprises extended section serves as hand guard,cross-section along A-A;

On FIG. 14—the appearance of the firearm in variant, when the proposedbarrel attachment unit comprises extended section, cross-section alongA-A, partial view C;

On FIG. 15—the appearance of the firearm in variant, when receiver hasinside a stop for stopping the breach end of barrel;

On FIG. 16—the appearance of the firearm and exploding view with theproposed barrel attachment unit, in variant when firearm hasconfiguration “bullpup”;

On FIG. 17—the appearance of the firearm with the proposed barrelattachment unit, in variant when firearm has configuration “bullpup”,cross-section along A-A, partial views B, C;

On FIG. 18—the appearance of the receiver with the proposed barrelattachment unit, in variant when firearm has configuration “bullpup”,cross-sections along A-A, B-B, C-C;

On FIG. 19—the appearance of the firearm with the proposed barrelattachment unit, in variant when firearm has configuration bullpup whenreceiver inside has a stop for stopping the breach end of barrel,cross-section along A-A, partial views B, C;

On FIG. 20—the appearance of the receiver for firearm with the proposedbarrel attachment unit, in variant when firearm has configurationbullpup and receiver inside has a stop for stopping the breach end ofbarrel, cross-section along C-C, partial view D.

BEST MODE FOR CARRYING OUT THE INVENTION

Firearms 70 with the proposed barrel attachment unit (FIG. 1, FIG. 2)comprising the barrel 1 (FIG. 3), the receiver (FIG. 4) and the base ofsighting devices (FIG. 5). Barrel 1 (FIG. 3) comprising the breech 1.1with the breech end 1.2 and the rim 1.3. The proposed barrel attachmentunit 3 (FIG. 4) of the receiver 2, having the form of a clamp, has ahole 3.1 in the upper part and the end 3.2.

The base of the sighting devices 4 (FIG. 5) is used to install thesights and has supporting lugs 4.1, as well as holes 4.2 for the passageof bolts. The barrel 1 (FIG. 2) is inserted into the barrel attachmentunit 3, of the receiver 2, until the rim 1.3 stopped at the end 3.2.When tightening the bolts 6 and nuts 7, the breech end 1.1 is fixed inthe barrel attachment unit 3. The sight base 4 is mounted on the barrel1 in such a way that one of the supporting lugs 4.1 of the sight basepasses through the hole 3.1 of the barrel attachment unit 3. Fixing ofthe sight base 4 on the breech 1.1 of the barrel 1 is carried out withscrews 5.

In variant of the proposed barrel attachment unit, the receiver 8 (FIG.8) is similar in design to the receiver 2 (FIG. 4) with the differencethat the barrel attachment unit 9 in the upper part comprising more thanone hole 9.1.

In this variant the barrel 1 (FIG. 7) is inserted into the barrelattachment unit 9 of the receiver 8 until it stops by rim 1.3 at the end9.2. When tightening the bolts 6 and nuts 7, the breech 1.1 fixes ininto the barrel attachment unit 9. The sight base is mounted on thebarrel so that the lugs 4.1 pass through the holes 9.1. The sight baseis fixing on the barrel by screws 5.

In variant, when the sight base 4 has a groove 4.3 (FIG. 9) in thesupporting lug 4.1. In this case, the installation of the barrel 1 (FIG.10) in the proposed barrel attachment unit 3 is similar to theinstallation shown in FIG. 2, with the difference that when the sightbase 4 (FIG. 10) is mounted, the rim of the barrel 1.3 enters in to thegroove 4.3.

In variant, when the sight base 4 (FIG. 11) has a protrusion 4.4 on thesupporting lug 4.1. In this case, the installation of the barrel 1 (FIG.12) in the barrel attachment unit 3 is similar to the installation shownin FIG. 2, with the difference that when the sight base 4 (FIG. 12) ismounted, the protrusion 4.4 stopped on the breech end 1.2.

The receiver 11 (FIG. 13) comprising a variant of the proposed barrelattachment unit 12, different from that shown in FIG. 8, by the presenceof an elongated part 13, working like hand guard. The barrel 1 (FIG. 14)is installed in the barrel attachment unit 12 until the rim 1.3 stops onthe end 12.2 and is fixing by the screws 6. The sight base 4 passes itssupporting lugs 4.1 through the holes 12.1 and is fixed on the barrelwith screws 5. An elongated section 13 of the barrel attachment unit 3surrounds the barrel 1 and performs the function of the hand guard.

A receiver 20 (FIG. 15), in the variant of the proposed barrelattachment unit 21 (FIG. 15), when in contrast to the embodiment shownin FIG. 2, barrel 1 (FIG. 15) stopping his breech end 1.2 at the stop24.

A variant of the firearm 100 (FIG. 16, FIG. 17), comprising a variant ofthe proposed barrel attachment unit 31 (FIG. 18) and made in the“bullpup” configuration. The barrel 1 (FIG. 17) is install in the barrelattachment unit 31 of the receiver 30 until the rim 1.3 stopped on theend 31.2. The barrel 1 in the barrel attachment unit 31 is tightened bymeans of screws 6. The sight base is mounted with its supporting lugs4.1, passing through the holes 31.1, directly onto the barrel andtightened by means of screws 5.

Firearm 100 (FIG. 19), performed according to the “bullpup”configuration, comprising a receiver 50 (FIG. 20) with a variant of theproposed barrel attachment unit 51. The barrel 1 (FIG. 19) is installedin the barrel attachment unit 51 until the breech end 1.2 is stopped onthe stop 51.2. The fixing of the barrel 1 in the barrel attachment unit51 is by means of screws 6. The sight base is mounted with itssupporting lugs 4.1, passing through the holes 51.1, directly onto thebarrel and fastened by means of screws 5.

1. Firearm comprising a receiver with a barrel attachment unit havingthe form of a clamp; a barrel with a breech, breech end and a rim; thesight base, characterized in that the barrel attachment unit in itsupper part comprising one or more through holes, through which thesupporting lugs of the sight base pass, what allows to mount the sightbase directly on the barrel.
 2. Firearm according to claim 1,characterized in that at least one of the supporting lugs of the sightbase has a groove, in which entering a rim of the barrel.
 3. Firearmaccording to claim 1, characterized in that one of the supporting lugsof the sight base has a protrusion that interacts with the end of thebreech end of the barrel.
 4. Firearms according to claim 1,characterized in that the barrel attachment unit has an elongated part,which serves as the hand guard.
 5. Firearms according to claim 1,characterized in that the barrel stopped his breech end at the stopinside the receiver.
 6. Firearm according to claim 1, characterized inthat the firearm has “bullpup” configuration.
 7. Firearms according toclaim 6, characterized in that the barrel stopped his breech end to thestop inside the receiver.